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    <script>
        function Stat() {

        }
        const Stat = new Stat();
        Stat.prototype = {
            //反正这样子创建prototype对象方法就得加 constructor然后指向构造对象
            constructor: Stat(),
            max: function () {

            },
            min: function () {

            }
        }
        console.log(Stat.prototype);
// 原型对象里面都有__proto__对象原型指向原型对象
// 所有原型对象里面有constructor，指向创造该原型对象的构造函数

    </script>
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